// Copyright (C) 2003--2004 Ronan Collobert (collober@idiap.ch)
//                
// This file is part of Torch 3.1.
//
// All rights reserved.
// 
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. The name of the author may not be used to endorse or promote products
//    derived from this software without specific prior written permission.
// 
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
// OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
// THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef NULL_X_FILE_INC
#define NULL_X_FILE_INC

#include "XFile.h"

namespace Torch {

/** NullXFile. A XFile which do nothing!
    Equivalent to the "/dev/null" file on UNIX systems.

    @author Ronan Collobert (collober@idiap.ch)
*/
class NullXFile : public XFile
{
  public:

    ///
    NullXFile();
    virtual int read(void *ptr, int block_size, int n_blocks);
    virtual int write(void *ptr, int block_size, int n_blocks);
    virtual int eof();
    virtual int flush();
    virtual int seek(long offset, int whence);
    virtual long tell();
    virtual void rewind();
    virtual int printf(const char *format, ...);
    virtual int scanf(const char *format, void *ptr);
    virtual char *gets(char *dest, int size_);

    //-----

    virtual ~NullXFile();
};


}

#endif
